How hard is to port a game to Xbox/Microsoft Store platforms?

Hello guys,

I never really worked with UNREAL, but I have experience with Unity (ported several titles to XB/SONY platforms). Well I have a opportunity to port a platform game, originally made for steam and the client needs it to run in Xbox One / Series X and Microsoft Store.

It’s a very simple platform game, single player, 2.5D and only have achievements from Xb Live.

How hard it is to port it (keep in mind I never really worked with unreal, I only have supperficial experience, but I have a good experience with Unity).

PS: The game uses UE5, its more complex than UE4?